public String shouldRunAsSingleOn()

in src/main/java/org/apache/sling/commons/scheduler/impl/QuartzJobExecutor.java [215:239]

• 23 lines of code
• 6 McCabe index (conditional complexity)

        public String shouldRunAsSingleOn() {
            if ( !isRunOnSingle() ) {
                return null;
            }
            final String[] ids = QuartzJobExecutor.SLING_IDS.get();
            boolean schedule = false;
            if ( ids != null ) {
                int index = 0;
                try {
                    final MessageDigest m = MessageDigest.getInstance("MD5");
                    m.reset();
                    m.update(getKey().getBytes("UTF-8"));
                    index = new BigInteger(1, m.digest()).mod(BigInteger.valueOf(ids.length)).intValue();
                } catch ( final IOException | NoSuchAlgorithmException ex ) {
                    // although this should never happen (MD5 and UTF-8 are always available) we consider
                    // this an error case
                    LoggerFactory.getLogger(getClass().getName()).error("Unable to distribute scheduled " + this, ex);
                    return "";
                }
                final String myId = SLING_ID;
                schedule = myId != null && myId.equals(ids[index]);
                return schedule ? null : ids[index];
            }
            return "";
        }